Improvement in anti-friction balanced-valves



ttiih tait WILLIAM SIEFERT, 0F NEW YORK,

N. Y., ASSIGNOR TO HIMSELF AND `MA'IYIIEIEW T. KANE, 0F SAME PLACE.

Letters Patent No.,113,10.2, dated March 28, 1871.

' IMPROVEMENT IN ANTI-FRICTION BALANCED-VALVES.

The Schedule referred bo ln 4these Lettera Patent and making part of thename.

To all uhom 'it 'may concer-n Be it known that I, WILLIAM SIEFERT, ofthe city of New York, in the county and State of New York, have inventeda new and improved Anti-Friction Balanced-Valve; and I do hereby declarethat -the following is a full, clear, and exact description thereof,which will enable others skilled in the ait to make and use the same,reference being had to the accompanying drawing forming part of thisspecification.

Figure 1 represents a vertical transverse section of my improvedanti-friction balanced-valve, the line x x, iig. 2, indicating-the.plane of section.

Figure 2 is a vertical longitudinal section of the same taken on theplane .of the line 'gy y, fig. 1.

Similar letters of reference .indicate corresponding parts. v

My invention relates to anti-friction balance-valves, and consists in animprovement thereon, which will be hereinafter fully described 'andsubsequently pointed ont in the claim.

A in thedrawing represents vthe valve. Itis of cylindrical form, hung ina cylindrical case, B, within which it can freely turn.

The valve is tubular, that is to say, bored lengthwise, to receive andcontain steam within its interior.

Through the lower part of the valve are cut the two apertures a b,which'serveto conduct steam ,alter- Anately to the ports cd, in thelower part of the case .The-valve receives rocking motion by suitablelink mechanism C, which preferably terminates in a fork, e, Where it isfastened to the valve.

The valve, by containing the live steam within its longitudinal bore, isfully balanced thereby in every direction, and works without materialfriction against any of its surfaces.

The case B is made in two parts. rIhe lower part fis rigidly secured tothe cylinder, while the upper semi-cylindrical portion g of the sameconstitutes a cap, covering the valve.

The cap g is connected with the base f by bolts h h, and held down uponthe same by springs t', so that thereby the case is made yielding to theextra pressure of steam back through the ports, which is exertedWhenever the engine is reversed.

, The cap 'contains a forked lubricating-channel, j, which receives oilin the middle and conducts it to the ends iu the manner indicated intlg. l, so as to let a constant supply of oil to the space between valveand case.

Having thus described my invention,

I claim as new and desire to secure by Letters Patent- 'lhe case B, madein two parts, and held together by springs, and tubular rockevalve A,arranged within .said case in the manner specified.

WILLIAM SIEFERT.

Witnesses:

Gno. W. MABEE, ALEX. F. ROBERTS.

